Silicon is considered as one of the most promising anodes for Li-ion batteries (LIBs), but it is limited for commercial applications by the critical issue of large volume expansion during the lithiation. In this work, the structure of silicon/carbon (Si/C) particles on graphene sheets (Si/C–G) was obtained to solve the issue by using the void space of Si/C particles and graphene. Si/C–G material was from Si/PDA-GO that silicon particles was coated by polydopamine (PDA) and reacted with oxide graphene (GO). The Si/C–G material have good cycling performance as the stability of the structure during the lithiation/dislithiation. The Si/C–G anode materials exhibited high reversible capacity of 1910.5 mA h g⁻¹ and 1196.1 mA h g⁻¹ after 700 cycles at 357.9 mA g⁻¹, and have good rate property of 507.2 mA h g⁻¹ at high current density, showing significantly improved commercial viability of silicon electrodes in high-energy-density LIBs.

硅被认为是锂离子电池（LIB）最有希望的阳极之一，但是由于锂化过程中大体积膨胀这一关键问题，硅在商业应用中受到限制。在这项工作中，通过利用Si / C颗粒和石墨烯的空隙空间，获得了石墨烯片（Si / C–G）上的硅/碳（Si / C）颗粒的结构，以解决该问题。Si / C-G材料来自Si / PDA-GO，其硅颗粒被聚多巴胺（PDA）覆盖并与氧化物石墨烯（GO）反应。Si / C-G材料具有良好的循环性能，因为它在锂化/散化过程中具有结构的稳定性。Si / C–G阳极材料在357.9 mA g ^-1的700个循环后表现出1910.5 mA hg ^-1和1196.1 mA hg ^-1的高可逆容量，并且在高电流密度下具有507.2 mA hg ^-1的良好倍率特性，显示出在高能量密度LIB中硅电极的商业生存能力显着提高。